( Reaffirmed 2012 ) IS : 4501- 1981 Indian Standard SPECIFlCATION FOR APRONS, RUBBERIZED, ACID AND ALKALI RESISTANT ( First Retiision ) Treated Fabrics Sectional Committee, Chairman SHRI S. L. GANDHI Members SHRI M. L. BAHRANI LT_COL R G WAsTRAD ] ( Alternates to Shri S. L. Gandhi SHRI A. K. BA~D~PADHYA SHRI P. L. NAG ( Alternate ) SHRI A. T. BASAK Ministry of Defence Ministry PCDC 16 Representing of Defence ( R & D ), New Delhi ) and Disposals, ( DGI ), New Delhi of Supplies Directorate General New Delhi SHRI A. R. HALDAR ( Alternate ) Basant Pran Electric Co Pvt Ltd, Calcutta SHRI BASANTKUMAR SHRI J. S. NARULA ( Alternote ) Bayer ( India ) Ltd, Bombay SHRI D. J. BHARUCHA SHRI K. J. JANAKAR ( Alternate ) National Organic Chemical Industries Ltd, Bombay SHRI T. S. BIDDAPA SHRI J. K. VADODARIA ( Alternate ) Bengal Waterproof Works ( 1940 ) Ltd, Calcutta SHRI A. BOSE SHRI B. DUTTA ( Alternate ) National Test House, Calcutta SHRI A. GHOSH JOINT DIRECTOROF MINES SAFETY Directorate General of Mines Safety, Dhanbad SHRI S. C. BATRA ( Alternate ) Caprihans India Ltd, Thane SHRI Z. S. KAJIJI Ministry of Railways, New Delhi DR S. P. MANIK SHRI P. K. MUNSHI ( Alternate ) Ahmedabad Textile Industry's Research Association, SHRI J. R. MODI Ahmadabad Bhor Industries Ltd, Bombay SHRI RAMAN M. PATEL SHRI K. L. SHAH ( Alternate ) ( Continued on page 2 ) Q INDIAN Copyright 198 1 lNSTI'IUTION I STANDARDS This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. IS : 4501- 1981 ( Continued from page 1) Representing Members Central Warehousing Corporation, New Delhi SHRI P. RAMBAS SHRI S. SAMPATHKUMAR ( Alternate ) Fibreglass Pilkington Ltd, Bombay SHRI G. H. RODRXKS East India Rubber Works Pvt Ltd, Calcutta SHRI B. ROY Directorate General of Technical Development, SHRI P. P. SHARMA New Delhi SHRI N. K. AGARWAL ( Alternate ) Varma Industrial Ltd, Bangalore SHRI K. SRINIVASAN Director General, IS1 ( Ex-oficio Member ) SHRI M. S. SAXENA, Director (P & C ) Secretary SHRI V. S. LAL Deputy Director ( P & C ), ISI Rubberized Convener SHRI A. Bose Fabrics Subcommittee, PCDC 16 : 5 Bengal Waterproof Works ( 1940 ) Ltd, Calcutta Members SHRI B. DUTTA ( Alternate to Shri A. Bose ) SHRI A. K. BANDOPADHAYA Ministry of Defence ( DGI ), New Delhi SHRI V. BHATTACHARYA( Alternate ) Directorate General of Supplies and Disposals, SHRI A. T. BASAK New Delhi SHRI D. K. NANLX ( Alternate ) SHRI P. K. CHATTERJEE Bayer ( India ) Ltd, Bombay SHRI A. CHELLARAJ Madura Coats Ltd, Madurai SHRI S. GNANASEKHARAN ( AIternate ) SHRI S. L. GANDHI Ministry of Defence ( R & D ), New Delhi SHRI M. L. BAHRANI ( Alternate ) National Test House, Calcutta SHRI A. GHOSH SHRI R. M. KHALADKAR Swastik Rubber Works Ltd, Pune SHRI Y. S. MARATHE ( Alternate ) SHRI N. C. MAZUMDAR India Waterproofing & Dyeing Works, Calcutta SHRI J. K. MAZUMDAR ( Alternate ) SHRI B. ROY East India Rubber Works Pvt Ltd, Calcutta SHRI PURSHO~TAMDAS ( Alternate ) IS:4501-1981 Indian Standard SPECIFICATION FOR APRONS, -RUBBERIZED, ACID AND ALKALI RESISTANT ( First Reoision ) 0. FOREWORD 0.1 This Indian Standard ( First Revision ) was adopted by the Indian Standards Institution on 13 March 1981, after the draft finalized by the Rubber Products Sectional Committee had been approved by the Petroleum, Coal and Related Products Division Council. 0.2 This standard was first published in 1967. The requirements for finished fabric and coating were not stipulated in the standard and reference to IS : 5915 was given which was under preparation at that time. In this revision suitable type, quality, grades covered under IS: 5915-1970" for preparation of these aprons have been stipulated. 0.3 Acid and alkali-resistant rubberized aprons are used by workers in chemical laboratories and in industrial establishments for protection against contact of the wearing apparel and skin with acids and alkalis. In order that these aprons effectively resist the action of acid and alkali and do not allow them to corrode through the apron to affect clothing or skin, the requirements of the material has to be defined and established. The general design of these aprons should be emphasized keeping in view comfortable wear as also avoiding use of superfluous material. 0.4 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : 2-1960t. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. 1. SCOPE 1.1This standard prescribes the requirements and the methods of sampling for acid and alkali-resistant rubberized aprons. *Specificationfor single texture rubberized waterproof IRules for rounding off numerical values ( revised ). fabrics. 3 IS : 45012. DESIGN 1981 2.1 This standard prescribes rubberized upon the requirements of the purchaser. Design 1 Design 2 with straps with tying portion. and buckles, tapes, aprons rounded of two designs depending neck and sleeve portion. sleeve straight neck and semi-rounded 3. MATERIAL 3.1 Waterproof Rubberized Double Faced Fabric - Conforming requirements of Type 2, Quality 2, Grade B of IS : 59151970*. 3.2 Sewing Cotton - Conforming to the requirements No. 31-603/6 ( 100 d tex x 6 ) of IS : 1720-1978t. 3.3 Eyelets 3.4 Buckles Made of aluminium Suitably of to the variety alloy size No. 24 of IS : 4084-1978:. nickel plated. 4. REQUIREMENTS 4.1 Colour - The finished material shall be white or of a suitable on two sides as agreed to between the purchaser and the supplier. 4.2 Workmanship and Construction colour 4.2.1 Design I -The make up and shape of the aprons shall conform generally to Fig. 1. The body of the apron shall be made from rubberized cloth, properly vulcanized and in accordance with 3.1. The neck and the sleeve portion shall be rounded as shown in Fig. 1 to accommodate wearer's Each apron shall have a strap at the arm and neck neck and arm corner. The strap shall be folded and sewn at both sides as specified in portions. Fig. 1. Each strap shall be provided with a buckle suitably nickel plated, with sliding jaw. The strap shall pass freely in the buckle. It shall be stitched with lock stitch having 32 stitches per dm. 4.2.2 Design 2 - The make up and shape of the ~aprons shall conform generally to Fig. 2. The body of the apron shall be made from rubberized cloth properly vulcanized and in accordance with 3.1. The strengthening pieces at the top and arm corners of the aprons shall be of the same material as that of the body and neatly stitched to the body of the apron. Each apron shall have four eyelets, one each at both arm corner and neck The eyelets shall be made of aluminium alloy of size No. 24 of corner. The eyelets shall be properly fixed on the strengthening IS: 4084-1978;. pieces in the position shown in Fig. 2. It shall be stitched with lock stitch having 32 stitches per dm. *Specification tSpecification SSpecification for single texture rubberized waterproof fabrics. for cotton sewing~threads ( second revision ). for eyelets and washers ( sail ) ( first revision ). 4 DETAIL AT V I ENLARGED SECTION XX All dimensions in centimetres. FIG. 1 5. PACKING AND RUBBERIZED APPRON WITH STRAPS MARKING suitably as agreed to 5.1 The aprons shall be dusted with talc and packed between the purchaser and the supplier. 5.2 Each apron shall be clearly marked inside with manufacturer's name or recognized trade mark, if any. The ink shall be non-irritating to skin and shall not impair the quality of aprons. 5.2.1 The aprons may also be marked with the ISI Certification Mark. NOTE- The use of the ISI Certification Mark is governed by the provisions of the Indian Standards Institution ( Certification Marks ) Act and the Rules The IS1 Mark on products covered by an and Regulations made thereunder. Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by IS1 and operated by the producer. IS1 marked products are also continuously checked by IS1 for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the IS1 Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution. 6. SAMPLlNG AND CRITERIA FOR CONFORMITY 6.1 Lot - All the aprons of the same design and belonging to the same batch of manufacture shall be grouped together to constitute a lot. 5 STRENGTHENING r* , , igl ENLARGED SECTION YY ENLARGED SECTION XX All dimensions in centimetres. FIG. 2 RUBBERIZED APRON WITH EYELETS 6.2 For ascertaining conformity of the material to the requirements specification, samples shall be tested from-each lot separately. of this on the 6.3 The number of aprons to be selected from a lot shall depend size of the lot and shall be according to Table 1. 6 IS : 4501- 1981 TABLE No. OF APRONS IN THE LOT 1 SCALE OF SAMPLING AND PERMISSIBLE NUMBER OF DEFECTIVES FOR COLOUR, CONSTRUCTION AND WORKMANSHIP Ag;gqt;; NUMBER OF TESTS TO BE CONDUCTED FOR PROOFING AND FINISHED FABRIC ACCORDING TO IS:5915-1970* (4) 1 1 2 3 C--A--, Sample Size (1) (2) 50 8 13 20 32 (3) 0 1 2 3 up to 51 to 100 101 to 300 301 and above *Specification for single texture rubberized waterproof fabrics. to 6.3.1 The aprons shall ensure the randomness may be followed. be selected from the lot at random. In order of selection, procedures given in IS : 490%1968* 6.4 Number of Tests and Criteria for Conformity Colour, Construction and Workmanship -Each apron selected accor1 shall be examined for these requirements. An apron failing in one or more of these requirements shall be regarded as The lot shall be considered as conforming to these requirements defective. if the number of defectives found in the sample is less than or equal to the corresponding acceptance number given in co1 3 of Table 1. ding to co1 2 of Table 6.4.1 6.4.2 The lot having been found satisfactory according to 6.4.1 shall be further tested for proofing compound and finished fabric according to Type 2, Quality 2 and Grade B of IS: 5915-1970t. The number of tests to be conducted for each of these requirements shall be according to co1 4 of Table 1. For this purpose, the required number of aprons shall be selected from those already examined according to 6.4.1 and found satisfactory. The lot shall be declared asconforming to the requirements of this specification, if no failure occurs in any test for both the requirements; otherwise not. *Methods for random sampling. tspecification for single texture rubberized waterproof fabrics. 7 INDIAN ON TREATED IS: STANDARDS FABRICS Fuel pump diaphragm fabrics: (a) synthetic rubber proofed, (b) varnish proofed Vinyl coated fabrics ( second revision ) 1259.1977 1421-1964 Cellulose nitrate coated fabrics ( revised ) 2037-1962 Tracing cloth 2089-1977 Common proofed canvas/duck and paulins ( tarpaulins ) ( second revision) 2244-1972 Glossary of terms relating to treated fabrics ( first revision ) 2789-1972 Special proofed paulins ( tarpaulins ) ( first revision ) 3322-1965 PVC-coated fabrics for foul weather clothing tubing ( flexible ducting ) 3768-1966 PVC-ventilation 4355-1977 Fire resistant brattice cloth ( firsf revision ) 4501-1967 Aprons, rubberized, acid and alkali resistant 4810-1968 Fumigation sheets and covers, rubberized 5915-1970 Single texture rubberized waterproof fabrics rubberized fabrics 6110-1971 Double-texture 6803-1972 Special proofed canvas and duck 7016 Methods of test for treated fabrics: Roll characteristics ( Part I )-1973 Determination of breaking strength and extension at break ( Part II )-1973 Tear strength ( Part III )-1973 Resistance to damage by flexing ( Part IV )-1973 Coating adhesion ( Part V )-1973 Bursting strength ( Part VI )-1973 ( Part VII )-1973 Water proofness ( Part VIII )-1973 Accelerated ageing 8698-1977 PVC fabrics for footwear fabrics 8699-1977 Expanded vinyl coated fabrics 1001-1956